Door operating mechanism



y 1934- J. P. ANDERSON DOOR OPE RATING MECHANISM Filed Nov. 23, 1927 4Sheets-Sheet 1 May 22, 1934.

J. P. ANDERSON DOOR OPERATING MECHANISM 4 Sheets-Shet 2 Filed Nov. 25,1927 INVENTOR y 1934. J, P. ANDERSON DOOR OPERATING MECHANISM Filed Nov.23, 1927 4 Sheets-Sheet 3 1. .H L THUHHL i Q a i r G, 3 .Q It: 3 L, a aL U h kwl' May 22, 1934.

J. P; ANDERSON DOOR OPERATING MECHANISM Filed Nov. 23, 1927 4Sheets-Sheet 4 Q INVENTOR Patented May 22, 1934 DOOR OPERATING MECHANISMJohn P. Anderson, Koppel, Pa., assignor, by mesne assignments, to KoppelIndustrial Car and Equipment Company, McKees Rocks, Pa., a corporationof Pennsylvania Application November 23, 1927, Serial No. 235,216

3 Claims.

The object of my invention is to provide a dump car with a dooroperating and controlling mechanism which will lock the doors with thebody horizontal and permit the opening of the discharging door with thetilting of the body and close and lock said door with the return of thebody to a horizontal position.

Another object being to maintain the door on the rising side of the carbody closed while permitting the descending door to be opened as the carbody is tilted.

A further object of my invention is to provide a dump car body with adoor operating mechanism which will permit the discharging door to bestopped in an opening position, by the application of an exterior force,and allow the body to continue its dumping movement. Furthermore, such amechanism will exercise positive closing and locking control of saiddoor, upon return of .20 the body to a horizontal position.

Fig. 1 is an end view of a dump car with the body in a horizontalposition and the doors closed; Fig. 2 is a section through the car andshows the trunnion bearings supporting the car body; Fig. 3 is a sectionthrough the car body showing the door operating mechanism; Fig. 4 is asection through the car with the body tilted and the discharging dooropened; Fig. 5 is a section along the line 5-5 of Fig. 4; Fig. 6 is asection taken along the line 6-6 of Fig. 1 showing a portion of the carand the provision for movement of the door operating levers.

Referring now in detail to the drawings where like reference charactersrefer to like parts, reference character 1 is a car truck with the carunderframe 2 supported thereon. Trunnion bearings 3 at the sides of saidunderfra-me supporting a car body 4 which is tiltable about either sidethereof. The doors 5 are attached to the sides of the car body by hinges6 so as to swing outwardly and downwardly when the car body is tiltedtowards their respective sides. At spaced intervals along the door aredownward depending arms 7, the lower ends of which are connected to thedoor operating mechanism. Portions of the downward depending member '7may be utilized to form a hinge for the door, as shown by the drawings,or independent hinges such as indicated by reference character 6 may beused. At intervals along the underframe are door operating members 8which extend across the underframe. These members 8 are connected at oneend to the underframe and at the opposite end to the downward dependingdoor members 7 by means of a connecting member 9. A stop 10 on themember 8 engages a portion of the member 9 to prevent the downwardmovement of the arms on the rising side during the tilting of the carbody. Beneath the car body and secured thereto are roller members 11which are adapted to cooperate with the door operating members 8 tolimit the opening of the car doors and to eiiect the closing of thedoors with the return of the tilted body to a horizontal position.

When the car is in a normal carrying and transporting position the carbody is rigidly supported by the trunnion bearings 3 on the carunderframe. The body rollers 11 are held tight against the dooroperating members 8 by the weight of the car body and prevent anymovement of these door 7 operating members and consequently the doors 5are held tightly closed. The body tilting means consists of telescopingpressure actuated pistons contained in cylinders along each side of thecar underframe. It will not be necessary to describe or show thesecylinders in the present invention as any of the various types known tothe prior art, that are suitable, may be used.

Assuming the body to be dumped to the righthand side of the carunderframe, the following actions will take place: the left-hand bodyactuating pistons will rise and tilt the car body; with the rising ofthe left-hand side of the car body, stops 10 of the members 8 and thebody rollers 11 on that side of the car will maintain their respectivepositions to the members 8 attached to the left-hand door and willprevent any movement of these members thus holding the risingor-lefthand door tightly closed. On the right-hand side of the car thebody rollers describe an arc in an upward direction away from the dooroperating means 8 attached to the right-hand door, leaving these members8 free to rise. The force of gravity and the weight of the lading comingin contact with the right-hand door will cause it to open and thusdischarge the lading.

It will be here noted that the only forces acting on the door to causeit to open are the weight of the lading and the force of gravity. Therollers 11 provide a limiting action to the opening of the doorproportionate to the angle of tilt assumed by the car body. The rollermembers 11 will pass out of contact with the upper surfaces of the dooroperating arms 8 with the tilting of the body so that while the amountthe door may open is limited by the angle of tilt assumed by the carbody there is no action by the members 8 to force the car door open. Asthe door begins to swing open on its hinges 6 the downward depending arm7, describe their path of travel and transmit their motion to theconnecting links 9 which, in turn, impart their motion to the dooroperating members 8 causing them to rise. Thus it will be seen themembers 8 are actuated only by the movement of the opening door and itsdownward depending arms '7, the advantage of such an arrangement beingreadily appreciated when a quantity of material is lying along thetracks where the car is dumping. As the discharge door descends with thetilting of the car and strikes any accumulation deposited along thesides of the tracks, the door will stop by reason of its contact withsuch accumulation and allow the car body to continue to tilt. If thiswere not true and the door were forced to continue to open, one of twothings would happen, either the door would be badly twisted or broken,or else the door operating mechanism would be twisted out of shape ordamaged beyond repair.

With the return of the tilted body to a horizontal position, the bodyrollers come into contact with the door operating members forcing themdownward toward the underframe, these members in turn transmit theirmotion to the members 9 to close and lock the door when the body hasresumed its horizontal position. The door operating members on theopposite side of the car remain inactive during this return of the carbody to the horizontal position.

With the above description it should be clearly understood that when thedoor is being opened the members 8 are nothing more than connectingmembers. They transmit the force of the opening door to the limitingaction of the rollers when the body is tilted in one direction, andtransmit the closing action of the rollers to the doors when the body istilting in the opposite direction. When the body begins to tilt the bodyrollers engaging the members 8 connected to the opening door, begin tomove out of contact with these members. When the body is completelydumped these rollers are in such a position that the door may be closedby exterior force and the resultant movement of the members 8 will notcause contact of these members with the rollers. Upon return of the bodyto a horizontal position, the rollers cooperate with the arms 8 andforce the discharge door closed.

Should it be desired to tilt the body to the lefthand side of theunderframe, a corresponding opposite action between the door operatingmembers and the doors will take place.

Throughout the specification no particular form of body has beendescribed nor has the 10- cation of the door operating arm beneath thebody been definitely fixed. In some cases it may, be desirable to havethe door operating arms or members 8 placed beyond the body so that intheir upward movement during the opening of their attached door the armswill not come into engagement with the floor. In other cases it may bedesirable to have the arms placed inwardly of the end of the body asshown in Fig. 1 in which case it will be desirable to stop the floor offshort behind the slope sheet 12 so that the arms 8 may move upwardlybetween the end sheet of the body and the slope sheet 12. It beingunderstood that the slope sheet 12 is the usual sheet placed inside theends of the body so as to facilitate discharge of the lading as the bodyis tilted.

Having thus described the invention what I claim as new and desire tosecure by Letters Patent is:

1. In a dump car, an underframe, a dump body mounted on trunnions neareach side of said frame, doors pivotally mounted at the sides of saidbody, transverse members connected near each side of said frame andextending to the opposite door, downward depending arms on said door,links connecting said transverse members and downward depending arms,attachments on said body cooperating with said transverse members tocontrol the vertical movement of said members, said links andattachments cooperating with said transverse members and downwarddepending arms to lock the doors in a closed position with the dump bodyhorizontal and to permit closing of the lower door when the body is in atilted position.

2. In a dump car, an underframe, a dump body, doors pivotally mounted atthe sides of said body, transverse members connected near each side ofsaid underframe and to the opposite doors, attachments on said bodycooperating with said members to limit the opening but not the closingof the discharging door of the tilting body.

3. In a dump car, an underframe, a dump body, doors pivotally mounted atthe sides of said body, transverse members connected near each side ofsaid underfrarne and to the doors at the opposite side, attachments onsaid body cooperating with said members to lock the doorsclosed with thebody horizontal, to maintain the upper door closed as the body is tiltedand to limit the opening but not the closing of the discharging door bysuch tilting.

JOHN P. ANDERSON.

